You need GX Developer but I noticed it only supports the A2N (S1) not sure if there are earlier models they are not shown on GXDev, GXWorks2 also supports it but only in GXDeveloper session that PLC is now not supported i.e. it is end of life as far as spares.
You could also try Medoc that is a old dos software so would not work on any win 7 or above.